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All Journal Jurnal Perikanan dan Kelautan Ensiklopedia of Journal
Melissa Justin Renjaan
Politeknik Perikanan Negeri Tual
Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Environmental Science Law, Crime, Criminology & Criminal Justice Social Sciences

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Types of Sex And Development of Gonad Protoginic Rice Grouper (Cromileptes altivelis) After Hormone Stimulation Abdul Zahri; Melissa Justin Renjaan; Farida Farida
Jurnal Perikanan dan Kelautan Vol 10, No 2 (2020)
Publisher : JURNAL PERIKANAN DAN KELAUTAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33512/jpk.v10i2.7123

Abstract

This study aims to analyze the effect of estradiol (E2) and methyltestosterone (MT) combined with hCG on the composition of sex and the gonad development of protogynous humpback grouper (Cromileptes altivelis). The fish experiment 13±1,5g of body weight in the nursery phase. Treatment with a estradiol solution of 3 mg mL–1+ hCG 20 IU mL–1(CE), MT 3mg mL–1+ hCG 20 IU mL–1(CM), estradiol 3 mg mL–1 (E), MT 3 mg mL–1 (M) and 9 mg mL–1 NaCl to control (K). Hormone with dose 1 mL kg–1 was injected on dorsal fin base, with frequency of six times and periode of two weeks. The fish are kept in a 500 liters fiberglass container with a calm water system for 11 months. Fish were fed pellets with protein content of 46% twice daily. The study used a completely randomized design with one treatment factor, the hormone and its combination. Giving hormones with combination, i.e. treatmenth CE and CM was effective to increase the percentage of gonad development with GSI value 0.4161±0.0978% and 0.4161±0.1055%, whilw HSI on CE 0.6456±0.0419% and CM 0.5797±0.1069%  The gonadal histologic observation showed transition pattern and sex change from female to male at treatment M and CM. The MT hormone is able to stimulate masculinization and its performance is more effective when combined with hCG, 90% from sample population. The development of female gonads in the phases of oogonia and male of masculinization result in the phase of spermatogonia.
PELATIHAN PENANAMAN BIOREEFTEK KEPADA PENGELOLA DESTINASI PANTAI NGURBLOAT, DESA NGILNGOF, KAB. MALUKU TENGGARA Melissa Justin Renjaan; Pradina Anjarwaty Sukirno; Jamaludin Kabalmay; Safinah Yulianty Sitania; Elisa Charisma Balubun; Karmena Teniwut
Ensiklopedia of Journal Vol 8, No 2 (2026): Vol. 8 No. 2 Edisi 2 Januari 2026
Publisher : Lembaga Penelitian dan Penerbitan Hasil Penelitian Ensiklopedia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33559/eoj.v8i2.3668

Abstract

The development of Ngurbloat Beach is currently progressing rapidly, particularly in terms of infrastructure improvement, the addition of tourist attractions and facilities, as well as the growth of local business actors who continue to enhance the quality of goods and services offered. As a nature-based tourism destination, long-term management is essential to ensure sustainability. However, this condition contrasts with the efforts of Ngurbloat’s management to promote diving and snorkeling tourism in the waters of Ngilngof Village. Coral reef planting activities have never been carried out due to the limited availability of information regarding the condition of the coral reef ecosystem in Ngilngof Village. Therefore, it is necessary to implement coral reef ecosystem management efforts for Ngurbloat Beach managers. The objective of this activity is to train destination managers to develop a conservation-oriented mindset and to understand the procedures for constructing bioreeftek as a method of coral reef conservation. The methods employed in this activity include discussion and training sessions. The results indicate an increased level of empowerment in terms of knowledge and skills among the managers, as they are now capable of constructing bioreeftek independently.Keywords: Ngurbloat, Destination, Bioreeftek
Co-Authors Elisa Charisma Balubun Farida Farida Jamaludin Kabalmay Karmena Teniwut Pradina Anjarwaty Sukirno Safinah Yulianty Sitania Zahri, Abdul